The plaster's plaster coating and/or surface may become less durable over time. Depending on your region, you may need to treat your pool every ten years or more. First, spalling and cracks must be fixed. Then the pool shell needs to be prepped. The prep will remove all plaster and make the surface rougher so that new layers can bond to it. The prep is done with a variety of techniques, including chipping, chemical surface engraving, and sandblasting.
Consider painting your concrete or fiberglass pool instead of resurfacing. You can water-blast the old paint and then spray on a new coat with epoxy paint (such as Nu-Pool), that should last 7-10 years. Acrylic or rubber-based paints can also be used but are not as durable as epoxy paint.
Check for cracks in the structure before you begin priming. Any cracks or holes can be filled with underwater pool patching. The style of your pool will dictate the type of patching that you do. You should call a contractor if there are any significant cracks.
concrete pool finishes